Joseph goetz



(No Model.

J. GOETZ. APPARATUS FOR PURIPYING GAS.

'No. 503,133. Patented Aug. 15, 1893. A

\ if z'izzessew Jxgziz/Qfogiz w UNITED STATES PATENT OFFICE.

JOSEPIIGOETZ, OF BERLIN, GERMANY.

APPARATUS FOR PU RIFYING GAS.

SPECIFICATION forming part of Letters Patent No. 503,133, dated August15, 1893. Application filed February 1 7, 1893- Serial No. 462,763. (Nomodel.)

Toall whom it may concern.-

Be it known that I, JOSEPH GoE'rz, a subj ect of the King of Prussia,residing at Berlin, Germany, have invented certain new and usefulImprovements in Apparatus for Purifying Coal-Gas; and I do herebydeclare the following to be a full, clear, and exact description of theinvention.

My invention relates to apparatus for eliminating or separating ammoniaand tar from coal gas, and it has for its object the provision of meanswhereby the separation is more effectually and economically attainedthan heretofore.

The invention consists essentially in the construction of the apparatus,as will now be fully described, reference being had to the accompanyingdrawings, in which,

Figure l is a vertical section of an apparatus' constructed according tomy invention, and Fig. 2 is a detail view in perspective of a portion ofthe separator.

One of the essential features of my invention consists in theconstruction of the separator so as to form a series of zigzag channelsor passages for the gas, and in the combination therewith of means forsupplying an absorbing liquid to the same. The zigzag channels orpassages I obtain by means of a series of sheet metal inverted gutters,b, in such manner as to leave a very narrow slit or passage, b',betweenadj acent gutters, and so that one series of gutters will overlap orstraddle the narrow slit or passage, b, between the gutters of theseries in rear or below. In practice the superposed series of guttersare so arranged that the side walls, 12 of the gutters of one serieswill lie in such proximity to the gutters below or in rear, as to leavea narrow slit or passage, b between them, as shown in Figs. 1 and 2,whereby the zigzag passages are obtained. These sheet metal gutters, b,are arranged on an inclined plane within a suitable box, a, eachindividualseries extending clear across the box, thus forming, so tosay, a slotted partition, and the length of the gutters is so chosenthat their lower edges will be some distance from the bottom of the box,a, which is thus divided into two compartments that communicate witheach other below the separator. The upper end of each transverse row ofgutters, b, is secured to a vertical partition, d, extending across thebox, a, the series of partitions dividing the box at this point into aseries of narrow chambers, a The lower end of the partitions, d, towhich end a transverse series of gutters is secured, is bent to holdsaid gutters at the desired inclination to a vertical, as shown in Fig.1, while the upper end of said partitions is secured to the bottom of afeed box, 0, that extends also across the box, a. The bottom of the feedbox is perforated along the chambers, a and water or weak ammonia liquorenters said feed box at 00, while the gas enters at a, on one side ofthe separator, and flows out at a on the opposite side of saidseparator, both the gas inlet and outlet being at the upper portion ofthe box, a, which is also provided with an overflow pipe, 6.

In Fig.1 Ihave shown four superposed trans verse series of gutters, b,but I do not desire to limit myself to this number, which may beincreased or decreased according to the vol-' ume of gas passing throughthe apparatus, nor doI desire to limit myself to any particularcross-sectional area of the individual gutters, as this may also bevaried without departing from the nature of my invention.

In practice I have found that the separation of tar takes place in thegutters nearest to the gas inlet, while the separation of the ammoniatakes place chiefly after the gas has passed the gutters nearest saidgas inlet, so that the apparatus performs the double function of washerand scrubber.

The separation of the ammonia and tar is based upon the fact that thegas is compelled to pass in a zigzag course through passages that areluted with a film of liquid, either wa ter or weak liquor. This lutingis obtained through the medium of the feeding devices described, theliquid being supplied under sufficientpressure to form jets which areprojected into the chambers, 00, and onto the upper face of the guttersover'which the liquid flows to the edges, and as the spaces between thegutters of a transverse row and those between such row and the nextsucceeding one are narrow, said spaces or slits are covered or closed bya thin layer or film of liquid through which the gas is compelled toflow,- since it cannot flow around the separator as the lower endthereof is luted by the liquid in the box. The gas will necessarily takethe course referred to, owing to the difference in resistance to itsflow, the film of liquid that seals the passages, 1), 7) above the levelof the liquid in the box offering less resistance to the flow of the gasthan the body of liquid within said box.

I have also found that when the apparatus has been in use the slits orpassages of commnnicatiomb, b between the gutters are not only luted orsealed by a film of liquid but also by a film of tar separated from thegas, so that the latter remains in contact with tar until it escapesfrom the outer transverse row of gutters, or substantially so, which isan advantage as is well known,and has the further advantage ofincreasing the resistance to the flow of the gas, and thereby moreeffectually separating the dust, ammonia and tar therefrom.

Inasmuch as the direction of flow of the gas is changed as it passesfrom one transverse row of gutters to another, and in view of the factthat the gaseous currents meet one another or collide, a constant andsomewhat violent agitation or mixing takes place, which materiallygreater rigidity and the necessary resistance to the pressure of thegas.

It is obvious that the feed box, 0, may be divided into two compartmentsby a suitable partition for the purpose of supplying thereto differentliquids, as for instance, weak liquor to one and water to the other ofthe two compartments, and this will be found of advantage whcn largevolumes of gas are passed through an apparatus constructed as described.

In practice I make the overfiow pipe 6, adjustable vertically, so thatthe level of the liquid within the box, a, and consequently the areathrough which the gas passes may be varied in accordance with the volumeof gas entering said box.

The adjustment of the overflow pipe, e, may be effected by hand in anydesired manner, or automatically by the provision of suitable mechanismcontrolled by the pressure of the gas entering the box, a.

In order to avoid essential variations in the adjusted level of theliquid within the box, due to varying volumes of gas entering the same,and to reduce as much as possible the transmission of these variationsto the entering gas, I so arrange the separator that the chamber formedthereby at the inlet side is of considerably less area than that at theoutlet side, so that an increase in the pressure at the inlet side ofthe separator will cause the level of the liquid to sinkcorrespondingly, while owing to the greater area of the chamber at theoutlet side of the separator, the level of the liquid will not bematerially affected.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is

1. A gas purifier comprising a closed separating chamber provided withgas inlet and outlet ports and with an overflow port at a lower levelthan said inlet and outlet ports, and a series of interspaced andlongitudinally slotted partitions extending across the separatingchamber between the inlet and outlet ports and from the top of saidchamber to a point below the level of the aforementioned ports, thesolid or unslotted parts of one partition lying in front of andoverlapping the slots in the partitions next preceding, and means forcausing a liquid to flow over said partitions, substantially as and forthe purpose set forth.

2. In a gas purifier, the combination with a closed purifying chamberprovided with gas inlet and outlet ports in opposite walls thereof,

and with an overiiow below the said inlet and outlet ports, ofvertically slotted interspaced partitions depending from the roof towardthe floor of the chamber to a point below the level of the aforesaidports, said partitions arranged relatively to each other so that a solidportion of one partition will lie opposite and overlap the slot in theadjacent partition, and means for feeding a liquid in a divided state asin the form of jets onto each of said partitions at the upper endthereof, for the purpose set forth.

8. A gas purifier comprising a closed separating chamber provided withgas inlet and outlet ports and with an overflow port at a lower levelthan said inlet and outlet ports, and a series of interspaced inclinedseparating partitions extending across said chamber between the gasinlet and outlet ports and from the top of said chamber to a point belowthe level of the aforementioned ports, said partitions constructed ofrows of interspaced channeled plates the channeled side of all saidplates facing toward the gas inlet and the plates of one partitionfacing and overlapping the spaces between the plates of the partitionnext preceding, and means for causing a liquid to flow over each of saidpartitions, substantially as and for the purpose set forth.

4. In a gas purifier the combination with a casing, a, having gas inletand outlet ports and an overflow port arranged as set forth, of thereservoir, 0, extending across the chamher, said reservoir provided witha feed port, with a perforated bottom, and with depending crosspartitions, as d, and the interspaced partitions constructed ofinterspaced rows of channeled plates b, one end of which is socured tosaid depending cross partitions, substantially as and for the purposeset forth.

In testimony whereof I have hereto affixed my signature in presence oftwo witnesses.

J OSEPII GOE"Z.

Witnesses:

RICHARD SCHMIDT, PAUL LAUBIER.

